Impact of cold spraying on microstructure and mechanical properties of optimized friction stir welded AA2024-T3 joint

Li, W.Y.; Li, N.; Yang, Xiawei; Feng, Yongbao; Vairis, Achilles

doi:10.1016/j.msea.2017.07.003

Cited by 21 publications

(14 citation statements)

References 48 publications

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“…There remains a limited understanding of the correlation among microstructure, mechanical properties, and corrosion behavior of the welded joints. However, in previous work of the authors, it was found that rotation speed proved to be more important process parameter than travel speed for the determination of the mechanical properties and corrosion performance of the welded joints. Optimum properties was obtained for traveling speed at 200 mm/min, and therefore the aim of this work is to investigate how corrosion behavior and mechanical properties can be related to microstructure evolution controlled by the rotation speed in FSWed AA2024‐T3 joints.…”

Section: Introductionmentioning

confidence: 91%

Influence of rotation speed on mechanical properties and corrosion sensitivity of friction stir welded AA2024‐T3 joints

et al. 2018

Materials & Corrosion

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A study of aluminum alloy 2024‐T3 friction stir welded (FSWed) joints under different rotation speeds at fixed travel speed of 200 mm/min is summarized. The effect of rotation speed on the hardness, tensile mechanical properties as well as corrosion sensitivity of the welded joints was explicitly investigated. The results show that the rotation speed has a remarkable influence on the shape and geometry of the stirred zone. Microstructure of the joint varied, while it was shown that microhardness was increased as the rotation speed of the process increased. This was attributed to the formation of high volume fraction of GPB zones under high rotation speed. An optimal in the strength to ductility compromise was obtained for the 600 rpm rotation speed. This was supported by the appropriate grain size and precipitates density and size, resulting in ultimate tensile strength of approximate 420 MPa and elongation at fracture of approximate 8.7%. This welded joint also exhibited the lowest corrosion susceptibility, while the heat‐affected zone proved to be more corrosion resistant than the respective friction stir zone.

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Section: Introductionmentioning

confidence: 91%

Influence of rotation speed on mechanical properties and corrosion sensitivity of friction stir welded AA2024‐T3 joints

et al. 2018

Materials & Corrosion

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“…Since FSW gives rise to a localized heating and thermal expansion and contraction between the hot stirred material and the cold base material, the produced welds are normally associated with thermally induced residual stresses that may substantially affect the fatigue behaviors [1,2,[12][13][14][15][16][17][18]. Specifically, the crack nucleation and propagation are well known to be promoted by tensile residual stress, whereas the compressive residual stress may result in crack retardation.…”

Section: Introductionmentioning

confidence: 99%

Unusual fatigue behavior of friction-stir welded Al–Mg–Si alloy

Vysotskiy

Malopheyev

Rahimi

et al. 2019

Materials Science and Engineering: A

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In this work, high-cycle fatigue behavior of friction-stir welded AA6061-T6 was studied. An emphasis has been made on the inter-relationship between microstructure, residual stress and fatigue resistance. The welds were produced under optimized conditions, including a combination of relatively high welding temperature and rapid cooling rate, and subsequently undergone a standard post-weld aging heat treatment. The optimized welds exhibited excellent fatigue performance that was comparable (or even superior) to that of the base material. This result was attributed to a considerable grain refinement in the stir zone, subtle material softening in the heat-affected zone as well as to significant residual stress generated during the optimized FSW.

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“…Since friction-stir welding results in localized heating, the concomitant thermal expansion of the welded material gives rise to residual stress. This may significantly affect fatigue behavior [1,2,[90][91][92][93][94][95][96]. Specifically, the nucleation as well as propagation of the fatigue cracks is well known to be promoted the tensile residual stress.…”

Section: Fatigue Performance Of Friction-stir Weldsmentioning

confidence: 99%

Optimization of Friction-Stir Welding of 6061-T6 Aluminum Alloy

et al. 2020

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In this work, two simple but effective strategies were proposed to optimize friction-stir welding of 6061-T6 aluminum alloy. The first one involved an optimization of welding variables to provide a combination of a relatively high welding temperature and the shortest possible thermal cycle during friction-stir welding. This inhibited precipitation coarsening in the heat-affected zone and resulted in considerable residual stress. Accordingly, the produced welds exhibited excellent strength characteristics under static and cyclic loading conditions. The second method was based on the application of the standard postweld T6 tempering. To avoid the abnormal grain growth, which usually occurs during solutionizing of aluminum frictionstir welds, a prestrain rolling was employed prior to the material tempering. This promoted an activation of recrystallization processes during subsequent heat treatment, thus suppressing the abnormal grain growth.

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Impact of cold spraying on microstructure and mechanical properties of optimized friction stir welded AA2024-T3 joint

Cited by 21 publications

References 48 publications

Influence of rotation speed on mechanical properties and corrosion sensitivity of friction stir welded AA2024‐T3 joints

Influence of rotation speed on mechanical properties and corrosion sensitivity of friction stir welded AA2024‐T3 joints

Unusual fatigue behavior of friction-stir welded Al–Mg–Si alloy

Optimization of Friction-Stir Welding of 6061-T6 Aluminum Alloy

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